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usb: chipidea: udc: don't truncate requests to single tds

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It is not safe to truncate requests to the maximum possible size the
controller can handle with one td and to keep working. That patch fixes
that with proper error handling instead.

Reported-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Michael Grzeschik 2013-03-30 12:54:08 +02:00 • committed by Greg Kroah-Hartman
parent 9e5064384a
commit 24dcade163
1 changed files with 2 additions and 2 deletions
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4
drivers/usb/chipidea/udc.c
View file

@ -1158,9 +1158,9 @@ static int ep_queue(struct usb_ep *ep, struct usb_request *req,
}
if (req->length > 4 * CI13XXX_PAGE_SIZE) {
req->length = 4 * CI13XXX_PAGE_SIZE;
retval = -EMSGSIZE;
dev_warn(mEp->ci->dev, "request length truncated\n");
dev_err(mEp->ci->dev, "request bigger than one td\n");
goto done;
}
/* push request */